Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3-3.153.05-3.08
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Uneven, Conchoidal
Cleavage
Good on [110] and on [001]
Poor on {100}
Mohs Hardness
6.0-6.55
2
10
👆🏻
Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)